Head library of moving beam gantry machine tool

Abstract

The head library of the moving beam gantry machine tool comprises a base, a rotary table is rotationally connected to the middle of the base, a head library support is arranged above the rotary table, a servo motor is installed on the left side of the upper surface of the base, and a speed reducer is connected to the output end of the servo motor. The rotary table is provided with four head library supports, different accessory heads are arranged on the four head library supports, the machining range of a traditional three-axis numerical control moving beam gantry machine tool can be effectively expanded, the machining efficiency of the machine tool can be improved, in order to guarantee stable rotation of the rotary table, a speed reducer is arranged to be connected to a servo motor, and secondary speed reduction is conducted through a gear transmission mechanism, so that the machining efficiency is improved. Meanwhile, a cam driven bearing is used for assisting in reducing the load, so that the rotary table can smoothly and stably rotate, an upper position sensor and a lower position sensor are arranged on the side face of the rotary table for positioning, accurate head replacement can be achieved, and the problem of head replacement failure caused by repeated positioning is avoided; and the use precision of the device is improved.

Description

Technical Field

[0001] The invention relates to the technical field of metal cutting machine tool parts, in particular to a head library of a moving beam gantry machine tool. Background Art

[0002] In order to expand the processing range of traditional three-axis CNC moving beam gantry machine tools and improve their processing efficiency, CNC moving beam gantry machine tools will be equipped with accessory heads. Generally, machine tools are only equipped with one accessory head, which is used to process a certain process. In this way, the machine tool only needs one head library and one head library with a dust cover. However, with the development of technology, the design and machining of machined parts have become more complicated. One accessory head can no longer meet the processing needs of machine tools, so machine tools will be equipped with multiple accessory heads to meet the needs of various processing processes. Moreover, some traditional head warehouses are placed directly on the workbench. Although this can meet the requirements of automatic head changing, it will reduce the space on the workbench and increase the extra load-bearing capacity of the workbench, resulting in the size of the workpiece processed by the machine tool being limited. Another method is to make a head warehouse on a column on one side of the machine tool. Although this avoids the head warehouse occupying the space of the workbench, the movement of the head warehouse is driven by a cylinder or a hydraulic cylinder. However, since the gas and hydraulic oil have a certain elasticity, the error of the head warehouse moving to the head changing point is large, and the spindle gripper will have deviations. Moreover, this mechanism can generally only accommodate one additional head, which cannot meet the needs of expanding the processing range of traditional machine tools. For this reason, a head warehouse for a moving beam gantry machine tool is proposed. Summary of the invention

[0003] The present invention aims to solve one of the technical problems existing in the prior art or related technology.

[0004] To this end, the technical solution adopted in the present invention is: A head warehouse of a moving beam gantry machine tool comprises a base, a turntable is rotatably connected to the middle part of the base, a head warehouse bracket is arranged above the turntable, a servo motor is installed on the left side of the upper surface of the base, a reducer is connected to the output end of the servo motor, a gear transmission mechanism is rotatably connected to the reducer, the gear transmission mechanism is composed of a driving gear and a driven gear, the driven gear is fixedly sleeved with the middle part of the turntable, an upper position sensor is arranged on the lower side of the turntable, a cylinder positioning mechanism is installed on the side of the turntable, and a lower position sensor is arranged on the lower side of the upper surface of the base at a position corresponding to the upper position sensor.

[0005] Preferably, adjustment washers are installed at the bottom of the base, and the number of the adjustment washers is four groups of eight.

[0006] Preferably, the base surrounds the turntable and is equipped with positioning holes at positions corresponding to the cylinder positioning mechanism, and the output end of the cylinder positioning mechanism is equipped with a gas rod inserted into the positioning hole.

[0007] Preferably, a cam follower bearing is provided between the base and the turntable, the cam follower bearing is assembled on the top of the base, and the turntable rolls on the cam follower bearing.

[0008] Preferably, the number of the upper position sensors and the lower position sensors is evenly two and corresponds to each other, and the lower position sensor is arranged on the arc-shaped side of the base.

[0009] Preferably, the number of the head storage brackets is four groups, and the top ends of the four groups of head storage brackets are all connected with additional head positioning pins for fixing the accessory head, and the number of the additional head positioning pins is four groups of sixteen.

[0010] Preferably, the number of the cam follower bearings is twelve and they are evenly arranged below the turntable.

[0011] By adopting the above technical solution, the beneficial effects achieved by the present invention are: In the present invention, a rotating structure of a turntable is adopted and equipped with four head storage brackets, on which different accessory heads are arranged, so as to effectively expand the processing range of the traditional three-axis CNC moving beam gantry machine tool and improve its processing efficiency. In order to ensure the stable rotation of the turntable, a reducer is arranged to be connected to the servo motor, and then the turntable is stably rotated after secondary deceleration of the gear transmission mechanism. At the same time, the cam follower bearing is assisted to reduce the load, so that the turntable can rotate smoothly and stably. Therefore, an upper position sensor and a lower position sensor are arranged on the side of the turntable for positioning, so that the head can be accurately changed, and the problem of head change failure caused by repeated positioning can be avoided, thereby improving the use accuracy of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A side cross-sectional schematic diagram of an embodiment of the present invention; Figure 2 A schematic top cross-sectional view of an embodiment of the present invention; Figure 3 A schematic diagram of a positioning hole according to an embodiment of the present invention; Figure 4 FIG. 1 is a schematic diagram of a position sensor according to an embodiment of the present invention.

[0013] Reference numerals: 1. Adjusting shims; 2. Base; 3. Turntable; 4. Cam follower bearing; 5. Head library bracket; 6. Additional head positioning pin; 7. Servo motor; 8. Reducer; 9. Gear transmission mechanism; 10. Upper position sensor; 11. Cylinder positioning mechanism; 12. Lower position sensor. DETAILED DESCRIPTION

[0014] To make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below in combination with specific implementations and with reference to the accompanying drawings. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0015] A head warehouse of a moving beam gantry machine tool provided by some embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0016] Example:

[0017] Combination Figure 1-4 As shown, a head warehouse of a moving beam gantry machine tool provided by the present invention comprises a base 2, an adjusting shim 1 is installed at the bottom of the base 2, and the number of the adjusting shims 1 is four groups of eight, a turntable 3 is rotatably connected to the middle part of the base 2, a cam follower bearing 4 is arranged between the base 2 and the turntable 3, the cam follower bearing 4 is assembled on the top of the base 2, and the turntable 3 rolls on the cam follower bearing 4, the number of the cam follower bearing 4 is twelve and is evenly arranged at the lower position of the turntable 3, a head warehouse bracket 5 is arranged above the turntable 3, the number of the head warehouse bracket 5 is four groups, and the top ends of the four groups of head warehouse brackets 5 are all plugged with additional head locating pins 6 for fixing the accessory head, and the number of the additional head locating pins 6 is four groups of sixteen, a servo motor 7 is installed on the left side of the upper surface of the base 2, a reducer 8 is connected to the output end of the servo motor 7, and a reducer 8 is rotatably connected to the reducer 8. Gear transmission mechanism 9, the gear transmission mechanism 9 is composed of a driving gear and a driven gear, and the reducer 8 and the gear transmission mechanism 9 are used to achieve secondary deceleration, thereby improving the torque of the servo motor 7 and ensuring that the turntable 3 can rotate stably. The driven gear is fixedly sleeved with the middle part of the turntable 3. An upper position sensor 10 is arranged on the lower side of the turntable 3, and a cylinder positioning mechanism 11 is installed on the side of the turntable 3. The base 2 surrounds the turntable 3 and is equipped with positioning holes at positions corresponding to the cylinder positioning mechanism 11. The output end of the cylinder positioning mechanism 11 is equipped with a gas rod inserted in the positioning hole, and a lower position sensor 12 is arranged on the lower side of the upper surface of the base 2 at a position corresponding to the upper position sensor 10. The number of the upper position sensor 10 and the lower position sensor 12 is evenly two and corresponds to each other, and the lower position sensor 12 is arranged on the arc side of the base 2.

[0018] Specifically, when replacing the accessory head, the encoder provided by the servo motor 7 can be used to record the information of different accessory heads on the four head library brackets 5, so that the corresponding head library bracket 5 can be rotated to the head replacement area as needed, thereby improving the reliability of the device; In addition, the twelve cam follower bearings 4 can effectively change the friction between the base 2 and the turntable 3 into rolling friction, avoiding wear and tear, while being more stable during rotation, ensuring the smoothness of the structure and reducing the load on the servo motor 7.

[0019] The working principle and use process of the present invention are as follows: when the accessory head needs to be replaced, the servo motor 7 is started to drive the gear transmission mechanism 9 to rotate, thereby driving the turntable 3 to rotate. When the turntable 3 rotates ninety degrees, the brake function of the servo motor 7 is used to lock the current angle. At this time, the upper position sensor 10 and the lower position sensor 12 are aligned and send a signal to the cylinder positioning mechanism 11. The gas rod of the cylinder positioning mechanism 11 is inserted into the positioning hole to achieve fixed position, thereby avoiding the angle deviation caused by power failure of the servo motor 7. Finally, the replacement of the accessory head can be started.

[0020] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A headstock of a moving beam gantry machine tool, comprising a base (2), characterized in that: A turntable (3) is rotatably connected to the middle of the base (2), a head storage bracket (5) is arranged above the turntable (3), a servo motor (7) is installed on the left side of the upper surface of the base (2), a reducer (8) is connected to the output end of the servo motor (7), a gear transmission mechanism (9) is rotatably connected to the reducer (8), the gear transmission mechanism (9) is composed of a driving gear and a driven gear, the driven gear is fixedly sleeved with the middle of the turntable (3), an upper position sensor (10) is arranged on the lower side of the turntable (3), a cylinder positioning mechanism (11) is installed on the side of the turntable (3), and a lower position sensor (12) is arranged on the lower side of the upper surface of the base (2) at a position corresponding to the upper position sensor (10).

2. The headstock of a moving beam gantry machine tool according to claim 1, characterized in that: Adjustment washers (1) are installed at the bottom of the base (2), and the number of the adjustment washers (1) is four groups of eight.

3. The headstock of a moving beam gantry machine tool according to claim 1, characterized in that: The base (2) surrounds the turntable (3) and is equipped with positioning holes at positions corresponding to the cylinder positioning mechanism (11); the output end of the cylinder positioning mechanism (11) is equipped with a gas rod inserted into the positioning hole.

4. The headstock of a moving beam gantry machine tool according to claim 1, characterized in that: A cam follower bearing (4) is provided between the base (2) and the turntable (3); the cam follower bearing (4) is assembled on the top of the base (2), and the turntable (3) rolls on the cam follower bearing (4).

5. The headstock of a moving beam gantry machine tool according to claim 1, characterized in that: The number of the upper position sensors (10) and the lower position sensors (12) is uniform and two and corresponds to each other, and the lower position sensor (12) is arranged on the upper arc side of the base (2).

6. The headstock of a moving beam gantry machine tool according to claim 1, characterized in that: The number of the head storage brackets (5) is four groups, and the top ends of the four groups of head storage brackets (5) are all plugged with additional head positioning pins (6) for fixing the accessory head, and the number of the additional head positioning pins (6) is four groups of sixteen.

7. The headstock of a moving beam gantry machine tool according to claim 4, characterized in that: The number of the cam follower bearings (4) is twelve and they are evenly arranged below the turntable (3).

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